Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Qual missão tem uma data de lançamento de 30 de dezembro de 1970, às 14:50 GMT?
 ###Tabelas: CREATE TABLE final_round_sunday (final_round_sunday_id AUTO_INCREMENT PRIMARY KEY, Place VARCHAR, Player VARCHAR, Country VARCHAR, Score VARCHAR, To par VARCHAR, Money ( $ ) VARCHAR) CREATE TABLE superfund_sites (superfund_sites_id AUTO_INCREMENT PRIMARY KEY, CERCLIS ID VARCHAR, Name VARCHAR, County VARCHAR, Proposed VARCHAR, Listed VARCHAR, Construction completed VARCHAR, Partially deleted VARCHAR, Deleted VARCHAR) CREATE TABLE conference_player_of_the_month_selections (conference_player_of_the_month_selections_id AUTO_INCREMENT PRIMARY KEY, Selection INT, Month VARCHAR, Season VARCHAR, Team record VARCHAR, Points per game VARCHAR, Field goal percentage VARCHAR, Rebounds per game VARCHAR, Blocks per game VARCHAR) CREATE TABLE general_information__&__feature_comparison (general_information__&__feature_comparison_id AUTO_INCREMENT PRIMARY KEY, Name VARCHAR, Year Began VARCHAR, s Registered user VARCHAR, Updated in past 30 days VARCHAR, Registration VARCHAR, Ability to syndicate off-site feeds VARCHAR, Userpics Free VARCHAR, Userpics Paid VARCHAR, Monthly Cost for Paid Account VARCHAR, Yearly Cost for Paid Account VARCHAR, Permanent Account VARCHAR) CREATE TABLE spaceflight_by_year (spaceflight_by_year_id AUTO_INCREMENT PRIMARY KEY, Rocket launch VARCHAR, Launch Date VARCHAR, Mission VARCHAR, Institutional authority VARCHAR, Launch Site VARCHAR, Outcomes VARCHAR, Derivatives VARCHAR)  
SELECT Mission FROM spaceflight_by_year WHERE Launch Date = december 30, 1970; 14:50 gmt